A processing device based on an automobile seat outer frame
By using an isosceles trapezoidal contact block and a 'V'-shaped clamping arm in conjunction with a limiting rod and adjustment components, the problem of cutting disc vibration in traditional cutting devices is solved, enabling automatic centering and flexible adjustment of pipes of different diameters, thus improving cutting accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUXI YUANLONG METAL PROD CO LTD
- Filing Date
- 2026-03-30
- Publication Date
- 2026-07-07
AI Technical Summary
The cutting disc rotation shaft of traditional cutting devices is prone to radial runout and axial movement, which causes the cutting disc to vibrate violently, affecting the flatness of the cut and operational safety.
The isosceles trapezoidal contact block and the 'V' shaped clamping arm work together with the first pulley, the limiting rod and the adjustment assembly, and the oil tank and piston rod work together to achieve automatic centering and flexible adjustment of pipes of different diameters, and suppress the vibration of the cutting disc.
It effectively suppresses radial runout of the cutting disc, ensures coaxial cutting trajectory, improves cut smoothness, reduces frictional wear, and enhances operational safety.
Smart Images
Figure CN121945869B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of frame cutting technology, specifically to a processing device based on the outer frame of an automobile seat. Background Technology
[0002] The outer frame of an automotive seat is a key load-bearing component of the entire vehicle seat system. It is mainly composed of metal tubing such as round tubes, square tubes, and irregularly shaped tubes, as well as stamped sheet metal, which are welded and assembled to form an integral structure. Its processing accuracy, structural strength, and assembly consistency directly affect the safety, comfort, and service life of the seat. In the manufacturing process of the outer frame of the seat, tube cutting is an indispensable key process. In small and medium batch production, on-site debugging, and maintenance and modification scenarios, the cutting and processing of automotive seat outer frame tubes is still mostly completed by using a traditional angle grinder with a cutting disc.
[0003] However, the rotating shaft of the cutting disc in traditional cutting devices is usually supported only by the bearings of the equipment itself. When rotating at high speed and under force in contact with the workpiece, the rotating shaft is prone to radial runout and axial movement, which in turn causes the cutting disc to vibrate violently. On the one hand, the vibration will aggravate the uneven force on the cutting disc, which can easily lead to risks such as chipping, cracking, and flying pieces, threatening the safety of operators. On the other hand, the vibration is transmitted to the seat frame tubing, which can easily cause uneven cuts and reduce the product qualification rate.
[0004] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention
[0005] The purpose of this invention is to provide a processing device based on the outer frame of an automobile seat to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a processing device based on an automotive seat outer frame, comprising a device base, a protective shell fixedly connected to the top of the device base, a first rack disposed in the middle cavity of the top of the protective shell, gears rotatably connected to both sides of the first rack on the inner wall of the protective shell, an offset rod fixedly connected to one side of the gear, a cutting machine mounted on the end of the offset rod away from the gear via a drive motor, a centering clamping mechanism installed at both the front and rear ends inside the protective shell, and a limit mechanism provided at the back end of the cutting machine;
[0007] The centering clamping mechanism includes abutment blocks disposed in the cavities at the front and rear ends of the protective housing. The abutment blocks are driven by an electric push rod installed at the bottom of the device base. Clamping arms are disposed on both sides of the abutment blocks. The middle part of the clamping arms is rotatably connected to the inner wall of the protective housing through a torsion spring. A top rod is fixedly connected to the top of the abutment blocks. The top of the top rod extends out of the cavities at the front and rear ends of the protective housing and places a cutting pipe fitting there. First pulleys are disposed at both ends of the abutment blocks and at the top of the top rod.
[0008] Preferably, the limiting mechanism includes a housing fixedly connected to the back end of the cutting machine. The housing is divided into two independent chambers by a partition plate. A limiting rod is rotatably connected to the inner wall of the left chamber of the housing. A limiting groove is formed on the surface of the middle area of the limiting rod. A drive disk is rotatably connected to the inner wall of the right chamber of the housing. A protrusion is fixedly connected to the surface of the drive disk. The protrusion passes through the partition plate and extends into the limiting groove. A second pulley is provided at the end of the limiting rod. The outer periphery of the second pulley abuts against the surface of the drive shaft of the drive motor. An adjustment component is installed on the right side of the housing at the back end of the cutting machine.
[0009] Preferably, the adjustment assembly includes a first oil tank fixedly connected to the back end of the cutting machine, a first piston rod that is slidably limited inside the first oil tank, the first piston rod extending into the right cavity of the housing and fixedly connected to a second rack, a second oil tank that is fixedly connected to the bottom of the device base, a second piston rod that is slidably limited inside the second oil tank, the output end of the second piston rod extending into the protective housing and fixedly connected to the bottom of the contact block.
[0010] Preferably, a bushing is fitted inside the cavity at the end of the limiting rod, surrounding the shaft of the second pulley. A push rod is fixedly connected to the side of the bushing away from the second pulley, and a first spring is fixedly connected to the side of the push rod away from the bushing. A clamping rod is fixedly connected to the other end of the first spring. The clamping rod extends out of the limiting rod and is driven by a miniature electric push rod installed on the back end of the limiting rod. The middle part of the clamping rod is limited to slide within a groove opened on the back end of the limiting rod.
[0011] Preferably, the clamping arm is configured in a "V" shape, the cross-section of the contact block is configured as an isosceles trapezoid, and the lower end of the clamping arm abuts against the inclined surface of the contact block via a first pulley.
[0012] Preferably, the drive disc has several sets of teeth evenly arranged around its periphery, which mesh with the tooth surface of the second rack. The end of the protrusion passes through the limiting groove and is limited to sliding within the annular groove opened on the inner wall of the left cavity of the housing.
[0013] Preferably, the oil chamber on the right side of the first oil tank is connected to the oil chamber at the bottom of the second oil tank via an oil delivery hose, and a second spring is sleeved on the surface of the first piston rod.
[0014] Preferably, the first rack is configured with double-sided teeth that mesh with the tooth surfaces of the gears on both sides. A displacement sensor is installed at the bottom of the first rack, and the displacement sensor is connected to a miniature electric push rod at the back end of the limiting rod via an electrical signal.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. This invention comprises an abutment block, a clamping arm, a top rod, a first pulley, a housing, a limiting rod, a limiting groove, a drive disc, a protrusion, and a second pulley. The abutment block adopts an isosceles trapezoidal structure, and the clamping arm adopts a "V" shaped structure. The two are connected by the first pulley. When the abutment block moves up and down, it can drive the clamping arms on both sides to close or open synchronously, realizing automatic centering and clamping of automotive seat outer frame tubes of different diameters and specifications. This ensures that the central axis of the tube remains coaxial with the cutting trajectory of the cutting machine. At the same time, the second pulley at the end of the limiting rod is in close contact with the surface of the drive shaft of the cutting machine drive motor to form a radial limit, which can effectively suppress the radial runout generated by the drive shaft during high-speed rotation and significantly reduce the vibration amplitude of the cutting disc.
[0017] 2. This invention comprises a first oil tank, a first piston rod, a second oil tank, a second piston rod, and a second rack. When the contact block moves up and down under the drive of the electric push rod, it drives the second piston rod to slide synchronously within the second oil tank. The oil is delivered to the oil chamber on the right side of the first oil tank through the oil delivery hose. The oil pushes the first piston rod to extend to the housing side, driving the second rack to move synchronously, driving the drive disc to rotate, and driving the limit rod so that the second pulley at the end of the limit rod applies a contact pressure to the drive shaft of the cutting machine drive motor. The clamping force of the second pulley on the drive shaft can be automatically adjusted according to the pipe cutting conditions. In the rough cutting condition, the clamping force is increased to improve rigidity and resist cutting impact and avoid aggravated vibration. In the thin-walled part cutting condition, the clamping force is reduced to achieve flexible buffering.
[0018] 3. This invention is equipped with a bushing, a push rod, a clamping rod, and a displacement sensor. The displacement sensor works in conjunction with a miniature electric push rod to form a closed-loop adjustment of the clamping force. The displacement sensor detects the cutting position and status in real time and transmits an electrical signal to the miniature electric push rod. The miniature electric push rod drives the clamping rod to finely adjust the clamping force of the second pulley. As the cutting depth increases, the preload of the first spring gradually increases and gradually decreases when the cutting ends, ensuring that the clamping force is always within the optimal range while reducing the frictional loss of the second pulley. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the planar structure of the centering clamping mechanism of the present invention;
[0021] Figure 3 This is a schematic cross-sectional view of the middle structure of the present invention;
[0022] Figure 4 This is a schematic plan view of the cutting machine and housing structure of the present invention;
[0023] Figure 5 This is a schematic diagram of the back end structure of the cutting machine of the present invention;
[0024] Figure 6 This is a schematic diagram of the left chamber structure of the housing of the present invention;
[0025] Figure 7 This is a schematic diagram of the right-side chamber structure of the housing of the present invention;
[0026] Figure 8 This is a cross-sectional schematic diagram of the internal structure of the limiting rod of the present invention.
[0027] In the diagram: 1. Device base; 2. Protective housing; 3. First rack; 4. Gear; 5. Offset rod; 6. Cutting machine; 71. Contact block; 72. Clamping arm; 73. Top rod; 74. First pulley; 81. Receiving shell; 82. Limiting rod; 83. Limiting groove; 84. Drive disc; 85. Protrusion; 86. Second pulley; 871. First oil tank; 872. First piston rod; 873. Second oil tank; 874. Second piston rod; 875. Second rack; 9. Bushing; 10. Push rod; 11. Clamping rod; 12. Displacement sensor. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] Please see Figures 1-8This invention provides a processing device based on an automotive seat outer frame: a processing device based on an automotive seat outer frame includes a device base 1, a protective shell 2 fixedly connected to the top of the device base 1, a first rack 3 disposed in the middle cavity of the top of the protective shell 2, gears 4 rotatably connected to both sides of the first rack 3 on the inner wall of the protective shell 2, an offset rod 5 fixedly connected to one side of the gear 4, and a cutting machine 6 mounted on the end of the offset rod 5 away from the gear 4 via a drive motor, the first rack 3 is configured with double-sided teeth and meshes with the tooth surfaces of the gears 4 on both sides, a displacement sensor 12 is installed at the bottom of the first rack 3, a centering clamping mechanism is installed at both the front and rear ends inside the protective shell 2, and a limit mechanism is provided at the back end of the cutting machine 6;
[0030] The drive mechanism drives the first rack 3 to move up and down linearly along the cavity at the top of the protective housing 2. The first rack 3 meshes with the gears 4 on both sides through double-sided teeth, driving the gears 4 on both sides to rotate synchronously in the same direction. When the gears 4 rotate, they drive the cutting machine 6 to gradually shift. The drive motor can drive the cutting disc of the cutting machine 6 to rotate at high speed to realize the cutting operation.
[0031] The centering clamping mechanism includes abutment blocks 71 disposed in the cavities at the front and rear ends of the protective housing 2. The abutment blocks 71 are driven by an electric push rod installed at the bottom of the device base 1. Clamping arms 72 are provided on both sides of the abutment blocks 71. The middle part of the clamping arms 72 is rotatably connected to the inner wall of the protective housing 2 through a torsion spring. A top rod 73 is fixedly connected to the top of the abutment blocks 71. The top of the top rod 73 extends out of the cavities at the front and rear ends of the protective housing 2 and places the cutting pipe fitting. First pulleys 74 are provided at both ends of the abutment blocks 71 and at the top of the top rod 73. The clamping arms 72 are arranged in a "V" shape. The cross section of the abutment blocks 71 is set as an isosceles trapezoidal structure. The lower end of the clamping arms 72 abuts against the inclined surface of the abutment blocks 71 through the first pulleys 74.
[0032] An electric push rod is installed at the bottom of the base 1 of the starting device. The output end of the electric push rod extends upward and drives the contact block 71 to move upward in a straight line along the cavities at both ends of the protective housing 2. Since the cross section of the contact block 71 is set as an isosceles trapezoidal structure, the clamping arm 72 has a "V" shaped structure. The lower end of the clamping arm 72 abuts against the inclined surface of the contact block 71 through the first pulley 74. When the contact block 71 moves upward, the inclined surfaces on both sides will generate a uniform lateral thrust on the first pulley 74 at the lower end of the clamping arm 72. This thrust drives the clamping arms 72 on both sides to synchronously retract inward around the rotation point in the middle. As the contact block 71 continues to move upward, the upper end of the clamping arm 72 gradually approaches the pipe until the clamping arm 72 is in close contact with the surface of the pipe, thus achieving the centering and clamping of the pipe.
[0033] In one embodiment of the present invention, the limiting mechanism includes a housing 81 fixedly connected to the back end of the cutting machine 6. The housing 81 is divided into two independent chambers by a partition plate. A limiting rod 82 is rotatably connected to the inner wall of the left chamber of the housing 81. A limiting groove 83 is formed on the surface of the middle area of the limiting rod 82. A drive disk 84 is rotatably connected to the inner wall of the right chamber of the housing 81. A protrusion 85 is fixedly connected to the surface of the drive disk 84. The protrusion 85 passes through the partition plate and extends into the limiting groove 83. A second pulley 86 is provided at the end of the limiting rod 82. The outer periphery of the second pulley 86 abuts against the surface of the drive shaft of the drive motor. The end of the protrusion 85 passes through the limiting groove 83 and is limited to sliding within the annular groove formed on the inner wall of the left chamber of the housing 81. An adjustment component is installed at the back end of the cutting machine 6 on the right side of the housing 81.
[0034] The protrusion 85 on the surface of the drive disk 84 extends into the limiting groove 83 in the middle of the limiting rod 82. When the drive disk 84 rotates, the protrusion 85 slides in the limiting groove 83, causing the limiting rod 82 to shift. This increases the contact pressure of the second pulley 86 at the end of the limiting rod 82 on the drive shaft of the cutting machine 6. The contact pressure of the second pulley 86 on the drive shaft of the cutting machine 6 can be adjusted by changing the offset of the limiting rod 82.
[0035] In one embodiment of the present invention, the adjustment assembly includes a first oil tank 871 fixedly connected to the back end of the cutting machine 6, a first piston rod 872 slidingly limited inside the first oil tank 871, the first piston rod 872 extending into the right side cavity of the housing 81 and fixedly connected to a second rack 875, a second oil tank 873 fixedly connected to the bottom of the device base 1, a second piston rod 874 slidingly limited inside the second oil tank 873, the output end of the second piston rod 874 extending into the interior of the protective housing 2 and fixedly connected to the bottom of the contact block 71, the right side oil cavity of the first oil tank 871 communicating with the oil cavity at the bottom of the second oil tank 873 through an oil delivery hose, a second spring sleeved on the surface of the first piston rod 872, and a number of sets of teeth evenly arranged around the periphery of the drive disc 84 and meshing with the tooth surface of the second rack 875;
[0036] When the pipe diameter is large, the electric push rod drives the contact block 71 to move downward, causing the second piston rod 874 to move downward. The oil in the second oil tank 873 is squeezed and transported through the oil delivery hose to the oil chamber on the right side of the first oil tank 871. The oil pushes the first piston rod 872 to extend to the side of the housing 81, causing the second rack 875 to move synchronously. When the pipe diameter is small, the electric push rod drives the contact block 71 to move upward, and the second piston rod 874 slides upward. A negative pressure is formed in the second oil tank 873. Under the action of the second spring, the oil in the first oil tank 871 flows back to the second oil tank 873 through the oil delivery hose. The first piston rod 872 drives the second rack 875 to move in the opposite direction.
[0037] In one embodiment of the present invention, a bushing 9 is sleeved in the cavity at the end of the limiting rod 82 around the shaft of the second pulley 86. A push rod 10 is fixedly connected to the side of the bushing 9 away from the second pulley 86. A first spring is fixedly connected to the side of the push rod 10 away from the bushing 9. A clamping rod 11 is fixedly connected to the other end of the first spring. The clamping rod 11 extends out of the limiting rod 82 and is driven by a miniature electric push rod installed at the back end of the limiting rod 82. The middle part of the clamping rod 11 is limited to slide within a groove opened at the back end of the limiting rod 82. The displacement sensor 12 is connected to the miniature electric push rod at the back end of the limiting rod 82 via an electrical signal.
[0038] The displacement sensor 12 controls the miniature electric push rod to drive the clamping rod 11 to slide within the groove opened at the back end of the limiting rod 82. The clamping rod 11 pushes the push rod 10 through the first spring, causing the bushing 9 to slide along the cavity at the end of the limiting rod 82. The bushing 9 is fitted around the rotating shaft of the second pulley 86, thereby finely adjusting the clamping force of the second pulley 86 on the transmission shaft.
[0039] Working principle: First, the operator places the outer frame tube of the car seat to be cut on the top of the push rods 73 at both ends inside the protective housing 2. Then, the electric push rod installed at the bottom of the device base 1 is activated. The output end of the electric push rod extends upward, driving the contact block 71 to move upward in a straight line along the cavity at both ends of the protective housing 2. Since the cross section of the contact block 71 is set as an isosceles trapezoidal structure, the clamping arm 72 has a "V" shaped structure. The lower end of the clamping arm 72 abuts against the inclined surface of the contact block 71 through the first pulley 74. When the contact block 71 moves upward, the inclined surfaces on both sides will generate a uniform lateral thrust on the first pulley 74 at the lower end of the clamping arm 72. This thrust drives the clamping arms 72 on both sides to synchronously retract inward around the rotation point in the middle. As the contact block 71 continues to move upward, the upper end of the clamping arm 72 gradually approaches the tube until the clamping arm 72 is in close contact with the surface of the tube, thus achieving centering and clamping of the tube.
[0040] When the contact block 71 moves up and down under the drive of the electric push rod, it drives the second piston rod 874 to slide synchronously within the second oil tank 873. When the pipe needs to be rough cut or cut with large cutting force, the pipe diameter is large. The electric push rod drives the contact block 71 to move downward, which drives the second piston rod 874 to move downward. The oil in the second oil tank 873 is squeezed and transported to the oil chamber on the right side of the first oil tank 871 through the oil delivery hose. The oil pushes the first piston rod 872 to extend to the side of the housing 81, which drives the second rack 875 to move synchronously. Since the drive disk 84 is evenly provided with several sets of teeth on its outer periphery, the movement of the second rack 875 will drive the drive disk 84 to rotate. The protrusion 85 on the surface of the drive disk 84 extends into the limiting groove 83 in the middle of the limiting rod 82. When the drive disk 84 rotates, the protrusion 85 will be in the limiting groove 83. 3. The sliding motion causes the limiting rod 82 to shift, increasing the contact pressure of the second pulley 86 at the end of the limiting rod 82 on the drive shaft of the cutting machine 6, thus improving the rigid constraint on the drive shaft and resisting the impact during the cutting process. When the pipe needs to be cut into thin-walled parts, and the conditions are sensitive to vibration and have a small cutting force, the pipe diameter is small. The electric push rod drives the contact block 71 to move upward, and the second piston rod 874 slides upward. A negative pressure is formed in the second oil tank 873. The oil in the first oil tank 871 flows back to the second oil tank 873 through the oil delivery hose under the action of the second spring. The first piston rod 872 drives the second rack 875 to move in the opposite direction, the drive disc 84 rotates in the opposite direction, and the protrusion 85 slides in the opposite direction in the limiting groove 83, causing the limiting rod 82 to shift in the opposite direction, reducing the contact pressure of the second pulley 86 on the drive shaft, achieving flexible buffering, and preventing vibration from being transmitted to the pipe.
[0041] Simultaneously, the displacement signal of the first rack 3 is detected in real time by the displacement sensor 12 installed at the bottom of the first rack 3, thereby determining the cutting position, cutting angle and current cutting condition of the cutting machine 6, and transmitting the detected electrical signal to the miniature electric push rod at the back end of the limiting rod 82. The miniature electric push rod drives the clamping rod 11 to slide within the groove opened at the back end of the limiting rod 82. The clamping rod 11 pushes the push rod 10 through the first spring, causing the bushing 9 to slide along the cavity at the end of the limiting rod 82. The bushing 9 is fitted around the rotating shaft of the second pulley 86, thereby finely adjusting the clamping force of the second pulley 86 on the transmission shaft, so that the preload of the first spring gradually increases as the cutting depth increases and gradually decreases when the cutting ends, forming a closed-loop adjustment to ensure that the clamping force is always within the optimal range.
[0042] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structure, features, and effects of the present invention.
[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A processing device based on an automotive seat outer frame, comprising a device base (1), characterized in that: The device base (1) is fixedly connected to a protective shell (2) at the top. A first rack (3) is provided in the middle cavity at the top of the protective shell (2). Gears (4) are rotatably connected on both sides of the first rack (3) on the inner wall of the protective shell (2). An offset rod (5) is fixedly connected to one side of the gear (4). A cutting machine (6) is installed at the end of the offset rod (5) away from the gear (4) via a drive motor. A centering clamping mechanism is installed at both the front and rear ends inside the protective shell (2). A limit mechanism is provided at the back end of the cutting machine (6). The centering clamping mechanism includes abutment blocks (71) disposed in the cavities at the front and rear ends of the protective housing (2). The abutment blocks (71) are driven by an electric push rod installed at the bottom of the device base (1). Clamping arms (72) are provided on both sides of the abutment blocks (71). The middle part of the clamping arms (72) is rotatably connected to the inner wall of the protective housing (2) through a torsion spring. A top rod (73) is fixedly connected to the top of the abutment blocks (71). The top of the top rod (73) extends out of the cavities at the front and rear ends of the protective housing (2) and places a cutting pipe fitting. First pulleys (74) are provided at both ends of the abutment blocks (71) and at the top of the top rod (73). The limiting mechanism includes a housing (81) fixedly connected to the back end of the cutting machine (6). The housing (81) is divided into two independent chambers by a baffle plate. A limiting rod (82) is rotatably connected to the inner wall of the left chamber of the housing (81). A limiting groove (83) is opened on the surface of the middle area of the limiting rod (82). A drive disk (84) is rotatably connected to the inner wall of the right chamber of the housing (81). A protrusion (85) is fixedly connected to the surface of the drive disk (84). The protrusion (85) passes through the baffle plate and extends into the limiting groove (83). A second pulley (86) is provided at the end of the limiting rod (82). The outer periphery of the second pulley (86) abuts against the surface of the drive shaft of the drive motor. An adjustment component is installed on the right side of the housing (81) at the back end of the cutting machine (6).
2. The processing device based on an automotive seat outer frame according to claim 1, characterized in that: The adjustment assembly includes a first oil tank (871) fixedly connected to the back end of the cutting machine (6), a first piston rod (872) slidingly limited inside the first oil tank (871), the first piston rod (872) extending into the right side cavity of the housing (81) and fixedly connected to a second rack (875), a second oil tank (873) fixedly connected to the bottom of the device base (1), a second piston rod (874) slidingly limited inside the second oil tank (873), the output end of the second piston rod (874) extending into the protective housing (2) and fixedly connected to the bottom of the contact block (71).
3. The processing device based on an automotive seat outer frame according to claim 2, characterized in that: A bushing (9) is fitted inside the cavity at the end of the limiting rod (82) around the shaft of the second pulley (86). A push rod (10) is fixedly connected to the side of the bushing (9) away from the second pulley (86). A first spring is fixedly connected to the side of the push rod (10) away from the bushing (9). A clamping rod (11) is fixedly connected to the other end of the first spring. The clamping rod (11) extends out of the limiting rod (82) and is driven by a miniature electric push rod installed on the back end of the limiting rod (82). The middle part of the clamping rod (11) is located in the groove opened on the back end of the limiting rod (82) for limiting and sliding.
4. The processing device based on an automotive seat outer frame according to claim 3, characterized in that: The clamping arm (72) is arranged in a "V" shape, and the cross section of the abutting block (71) is set as an isosceles trapezoid. The lower end of the clamping arm (72) abuts against the inclined surface of the abutting block (71) through the first pulley (74).
5. The processing device based on an automotive seat outer frame according to claim 4, characterized in that: The drive disk (84) has several sets of teeth evenly arranged around its periphery and meshes with the tooth surface of the second rack (875). The end of the protrusion (85) passes through the limiting groove (83) and is limited to sliding within the annular groove opened on the left inner wall of the accommodating shell (81).
6. The processing device based on an automotive seat outer frame according to claim 5, characterized in that: The oil chamber on the right side of the first oil tank (871) is connected to the oil chamber at the bottom of the second oil tank (873) via an oil delivery hose, and a second spring is sleeved on the surface of the first piston rod (872).
7. The processing device based on an automotive seat outer frame according to claim 6, characterized in that: The first rack (3) is configured with double-sided teeth and meshes with the tooth surfaces of the gears (4) on both sides. A displacement sensor (12) is installed at the bottom of the first rack (3). The displacement sensor (12) is connected to the miniature electric push rod at the back end of the limiting rod (82) via an electrical signal.